Development of a mass spectrometer using two rotating electric fields
Development of a mass spectrometer using two rotating electric fields
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使用两个旋转电场的质谱仪的开发
DOI：
10.1116/1.4944838
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Moritani
中科院分区：
文献类型：
--
作者：
M. Nojima;Yuki Anai;M. Hotta;S. Kurumi;Kaoru Suzuki;T. Adachi;Takashi Kusanagi;K. Moritani
作者提出了一种新的质量分析器的原则，涉及一对旋转电场（REF）。从电子学、离子光学和工作原理的角度对它的设计进行了评述。通过将Ga聚焦离子束柱直接引入到REFs光学系统中，证明了使用REFs按质量分离离子。通过优化系统相衬度，使69Ga+离子向中心轴会聚，71Ga+离子形成环形图案。环形图案中的不对称性是由每个REF电极的交流电压的不均匀性引起的。通过改变频率，69Ga+和71Ga+突起的位置可以在中心和外部之间交换。
The authors propose a new principle for a mass analyzer involving a pair of rotating electric fields (REFs). Its design is reviewed from the perspectives of electronics, ion optics, and operating principle. The use of REFs to separate ions by mass was demonstrated by introducing a Ga focused-ion-beam column directly into the REFs optical system. By optimizing the system phase contrast, the 69Ga+ ions were made to converge to the central axis while the 71Ga+ formed an annular pattern. Asymmetries in annular patterns are caused by nonuniformity in the alternating current voltage of each REF electrode. By varying the frequency, the locations of the 69Ga+ and 71Ga+ projections can be exchanged between the center and exterior.